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Heterologous image registration method based on FAST feature extraction and PIIFD feature description

A heterogeneous image and feature description technology, applied in the field of heterogeneous images, can solve the problem of low registration accuracy, and achieve the effects of improving accuracy, enhancing similarity, and reducing false matching.

Inactive Publication Date: 2019-07-12
SHANGHAI JIAO TONG UNIV +1
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Problems solved by technology

[0007] The registration accuracy of the existing heterogeneous image registration methods is still low, and there is a huge space for research in terms of efficiency and performance

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  • Heterologous image registration method based on FAST feature extraction and PIIFD feature description
  • Heterologous image registration method based on FAST feature extraction and PIIFD feature description
  • Heterologous image registration method based on FAST feature extraction and PIIFD feature description

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Embodiment Construction

[0030] The technical problem to be solved by the present invention is to provide a heterogeneous image registration method based on FAST feature extraction and PIIFD feature description.

[0031] The heterogeneous image registration method disclosed in the present invention includes the following steps:

[0032] Step S1, using the FAST algorithm to respectively extract the corner points of two heterogeneous images as feature points;

[0033] Step S2, using PIIFD to respectively construct feature descriptors for the obtained feature points;

[0034] In step S3, for the obtained feature point pairs, a matching strategy based on the nearest neighbor ratio threshold value is used to obtain rough matching point pairs, and further, RANSAC is used to eliminate mismatches to obtain fine matching point pairs.

[0035] by figure 1 The infrared image shown and figure 2 The visible light image registration shown as an example, the feature fine matching point pair obtained by the metho...

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Abstract

The invention discloses a heterologous image registration method based on FAST feature extraction and PIIFD feature description. Through FAST feature extraction, PIIFD feature description, nearest neighbor proportion threshold coarse matching, RANSAC mismatching elimination and least square affine transformation calculation, a spatial transformation relation between heterologous images can be obtained. The technical solution of the invention has the advantages of perfect process, high robustness and strong practicability. The method is not easily influenced by the quality of the heterologous image, can overcome the interference of the image background and other factors on feature extraction, and can well solve the problems of low precision, large error, low speed and the like in the registration of the heterologous image at present.

Description

technical field [0001] The invention relates to a heterogeneous image method, in particular to a heterogeneous image registration method based on FAST feature extraction and PIIFD feature description. Background technique [0002] Heterogeneous image registration is a technical difficulty and a necessary step in heterogeneous image fusion. Specifically, heterogeneous image registration is to find the spatial transformation relationship of pixels between heterogeneous images, so that the pixels in one image are accurately mapped to the pixels in another image. In the past three decades, image registration and fusion technology has developed rapidly and has been gradually applied to important fields such as military affairs, telemetry, material mechanics, medical applications, and digital imaging. [0003] Heterogeneous image registration is inherently extremely complex. The imaging mechanisms of heterogeneous images are usually different, so the quality and characteristics ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/33
CPCG06T7/33G06T2207/20164
Inventor 刘亚东戴进墩罗林根傅晓飞余钟民
Owner SHANGHAI JIAO TONG UNIV
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